Fluid-pressure regulator.



F. L. JAHN.

FLUID PRESSURE REGULATOR.

APPLICATION FILED JAN. 26, 1909.

925,812. Patented June 22,1909.

Mincsses. Inventor.

MU. Frcdcric/(l/Jahn.

' obtain the slight movement whi.

UNITED STATES PATENT OFFICE.

FREDERICK L. JAHN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO WATSON &McDANIEL COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OFPENNSYLVANIA.

FLUID-PRESSURE REGULATOR.

Specification of Letters Patent.

Patented June 22, 1909.

exact description of the invention, such aswill enable others skilled inthe art to which it apqpertains to make and use the same.

T isinvention relates to improvements in fluid ressure regulating valveswherein large doub e unbalanced valves are, by the use of, com oundlevers, controlled by a comparative y small diaphragm, owing to themove- -ment of the diaphra m, by the compounding of the levers, beingless than the movement of the valve. Without the compoundin a diaphragmof extremely large and practically pro 'bitive diameter must beemployed, to

. ,will not disintegrate the diaphragm, and also destroy its necessarysensitive action. To make the valve attachments free from friction thecompound levers are mounted on rollers.

The contained parts are readily removed, from the case without breakingpipe joints,

and the case, owing to the use of the small diaphragm is of convenientsize. The valve, owing to lessened friction, is very sensitive tofluctuations upon the initial side, and also equally effective indelivering a uniformly predetermined pressure.

The inventionis illustrated in the accompanyin drawing, the figure beinga central vertica section, wherein 1 is the case, 2 the pressure inletthereto, 3 the outlet and 4 the bottom cover. main valve is formed of anupper art 5 and a lower part 6 connected bya nec 7, part 5 having aremovable and renewable seat 8, and asimilar seat 9 being provided forart 6, the seats being secured in a wall 10. megral with parts 5,6, 7there is a stem 11 with ahead 12 havin a pin 13 securing it to thebifurcated bent ever 14, which has its opposite end carried by a roller15 on a in 16.

Practically midway of lever 14 t ere is attached a bent lever 17 by apin 18, with a roller 19 at the outer end of the lever, on a in 20, andat the central line of the valve ever, 17 is connected by a pin 21 to aplate 22 secured. to the high pressure diaphragm 23. Rollers 15, 19 restupon a seat 24, en-

The

circling case 1, and are vertically secured by a ring 25 under thediaphragm 23, which in turn is secured by a cover 26. The main valve,part 5, opens into a chamber 27 having a removable top 28 freelysurrounding. stem- 11, and leaving a slight annular s ace 29 for fluidflowing to the underside of igh pressure diaphragm 23. A spring 30 isseated between top 28 and part 5 of the valve to close the valve whennot in use.

At the inletside of the case there is a high pressure passage 31 intocover 26, and a restricted passage 32 into the high pressure chamber 33over diaphragm 23. Cover 26 has a neck 34 inclosing a low pressurechamber 35 with a seat 36 for the controller valve 37 o ening into thehigh ressure chamber 33, t e valve being guide in an upwardly extendedneck 38 surrounded by a spring 39 controlled by a nut 40 and a washer 41to normally hold the controller valve 37 closed. An annular passage 42around the upward extension of valve 37 is in communication wvith thelow pressure chamber 35 by an open ing 43. There is also a low ressurepassage 44 from chamber 35 to the elivery side 3 of the valve case, withan exterior exit 45 which may be closed or used, according to theservice required by the valve.

Mounted above chamber 35 there is a low pressure diaphragm 46 secured bya casing 47 wherein 1s a round faced spring seat 48 carryin a spring 49with an upper seat 50 control ed by a screw 51 having a lock nut 52, thespring 49 being set by screw 51 to determine the ressure to be deliveredfrom the pressure out et, and a cover 53 incloses screw 51. The part 6of the valve has rings 54 as guides.

The operation is as follows: High pressure fluid flows in at 2 and intopassage 31 and in a restricted degree through passage 32 to the highpressure chamber 33, and as the pres- 1 through passage 32, reducing thepressure which downwardly deflects diaphragm 23 to a less degree thanthe ressure against art 5 of the valve which W1 then be opene for thepassage of a reduced flow to outlet 3, also through annular space 29under diaphragm' 23, through dpassage 44 to low pressure chamber 35 anagainst its diaphragm 46. Durin the continuance of an even low pressuredelivery, the parts described will remain inactive, but in the event ofan excess of low pressure being delivered it will cause low pressurediaphragm 46 to recede, the controller valve 37 to close and highpressure to again accumulate in chamber 33, causing high pressurediaphragm 23 to close valve 5-6 and restrict the pressure delivery.Controller valve 37 is very sensitive in its actions, and its slightestmovement is suflicient to instantly regulate the desired degree of lowpressure to be delivered, consequent upon the action of the low pressurediaphragm as subjected to an excess or decrease of low pressure.

I claim 1. In a fluid pressure regulator, a case, an inlet and an outlettherefor for fluid flowing, a double seated unbalanced valve controllingthe passage from the inlet to the outlet, and seated against thepressure, renewable seats for the valve, lower guiding means for thevalve, an up er stem for the valve and means for its ree guidance; ahigh pressure diaphragm, a system of compound -levers connecting thediaphragm and the valve stem, and whereby the movement of the dia phragmis less in degree than the movement of the valve, a high pressurechamber above the high pressure diaphragm, and a diminu tive highpressure et thereto; a low pressure chamber and a low pressure diaphragmtherefor; a controller valve between the high and low pressure chambers,resilient means to depress the low pressure diaphragm and open thecontroller valve and thereby cause the high pressure diaphragm to openthe main valve; and a assage from the outlet to the low pressure 0 amberand the low pres sure diaphragm whereby fluctuations of low .a highpressure inlet and a low pressure outlet, an unbalanced valveintercepting the passage through the case, and formed of an upper diskpart and a lower art with guid- 'ing wings; a removable seat or eachpart; a

stem above the upper part, a free guide therefor, and resilient means tonormally close the valve; a high pressure diaphra m and a system ofcompound levers with re er supports connected to the stem and thediaphragm; a high pressure chamber above the igh pressure dia hragm, andin communica-- tion with the in et; a low pressure chamber and a lowpressure diaphragm above the low pressure chamber, with resilient meansfor the depression of the diaphragm; a passage between the high pressureand the low pres sure chambers, and a controller valve therein withresilient means for its closure; and a passage from the outlet to thelow pressure chamber and under its diaphragm whereby fluctuations of lowpressure control the -movement of the dia hragm to open and close thecontroller va ve.

3. In a fluid pressure regulator, in combination, a double seatedunbalanced valve, a diaphragm actuated by high pressure, a connectionfrom the valve to the diahragm by which the diaphragm is moved in essdegree than the valve; a low pressure diaphragm, resilient means for itsdepression, a controller valve located between the high pressure and lowpressure dia hragms, opened by the deression of the ow pressurediaphragm and aving resilient means for its closure, and means wherebythe low pressure dia hragm is actuated to permit the closing of t e controller valve upon an excess accumulation of pressure at the deliveryside of the valve.

In testimony whereof, I affix my signature, in the presence of twowitnesses.

FREDERICK L. JAHN. Witnesses:

RANBOM O. Waicnr, WILLIAM C. SrroEvnn.

